Titre :

Photoactivity Properties of ZnO-Doped Erbium: Synthesis, Characterization, and EPR Spectroscopy Investigation

Auteur(s) :

Bedhouche, Fatiha [Auteur]
Soualah, Ahcène [Auteur]
Djouadi, D. [Auteur]
Ahouari, Hania [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Ben Tayeb Meziane, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Titre de la revue :

Water Air Soil Pollut.

Nom court de la revue :

Water Air Soil Pollut.

Numéro :

235

Pagination :

-

Date de publication :

2024-01-20

ISSN :

0049-6979

Mot(s)-clé(s) en anglais :

Sol-gel process
Supercritical solvent
UV light
Photocatalysis
Methylene blue (MB)
Er-doped ZnO

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

Pure ZnO and erbium (1, 3, and 5 at. %)-doped ZnO nanoparticles aerogels were synthesized by sol-gel in supercritical drying conditions of isopropanol. The aim of this work is to study the effect of erbium ions on structural, ...
Lire la suite >Pure ZnO and erbium (1, 3, and 5 at. %)-doped ZnO nanoparticles aerogels were synthesized by sol-gel in supercritical drying conditions of isopropanol. The aim of this work is to study the effect of erbium ions on structural, optical, and photocatalytic properties of ZnO aerogels using various physicochemical techniques. The photocatalytic degradation of methylene blue (MB) under UV light irradiation is significantly enhanced with the introduction of Er³⁺ ions into the structure. The complete degradation of MB (99%) was obtained with an optimum of 1 and 3 at. % of erbium after 100 min of UV irradiation. These results are in good agreement with those obtained by electron paramagnetic resonance (EPR) spectroscopy spin trapping measurements where the highest amount of hydroxyl radicals •OH, responsible for the degradation of methylene blue, is observed with ZnO doped with 1 and 3 at. % erbium. A decrease of the electron-hole pairs recombination rate was confirmed by photoluminescence (PL) analyses in the Er-doped samples, due to the high interactions between Er³⁺ ions which lead to an increase of the non-radiative process originated from PL quenching. Graphical abstractLire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Équipe(s) de recherche :

Propriétés magnéto structurales des matériaux (PMSM)

Date de dépôt :

2024-02-28T23:56:47Z
2024-03-22T10:19:13Z